Multi-objective optimization control method and device of microgrid

Abstract

The invention provides a multi-objective optimization control method of a microgrid. The multi-objective optimization control method comprises the following steps of firstly, building an optimized objective function of the microgrid, wherein the objective function at least comprises an electric charge minimum objective function and a battery health state function; secondly, determining a charging-discharging power constraint, a charging-discharging frequency constraint and a total electric quantity storage constraint of an optimized energy storage battery of the microgrid; thirdly, figuring out the objective functions by a particle swarm optimization algorithm to obtain the optimal solution and the worst solution of each objective function; and finally, obtaining a weight coefficient of each objective function by a linear weighting sum method, and obtaining the optimal solution of multi-objective optimization control of the microgrid. Therefore, by the scheme, multi-objective optimization is carried out on the charge state and the service lifetime of an energy storage system, and the running economy of the microgrid can be effectively improved, and the energy storage service lifetime of the microgrid can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of power grid optimization, in particular to a micro-grid multi-objective optimization control method and device. Background technique [0002] With the continuous expansion of the grid scale, the traditional grid construction mode of centralized power generation and long-distance transmission shows more and more limitations. On the other hand, with the gradual depletion of conventional fossil energy, clean and efficient renewable energy power generation technology has received extensive attention. Microgrid is one of the important forms of distributed power generation. It can run in parallel with the large grid or independently provide electric energy for local loads. It helps to solve various problems encountered by the large grid and is an important component of smart grid construction. part. The optimal operation of the microgrid is to achieve the optimization of the overall cost while meeting the load...

AI Technical Summary

Problems solved by technology

[0003] At present, the micro-grid optimization objective is relatively single, and the hybrid energy storage system is not considered separately. Therefore, providing a micro-grid multi-objective optimization control method is an urgent technical problem to be solved at present.

Images